A cylinder holding refrigerant recovered during the day is going back to the shop where other people will handle it. Beyond being a proper recovery cylinder, what marking does it need?
- AA tag showing the customer name and the address of the job the refrigerant came from that day
Customer and job details belong in the service records. They tell the next handler nothing about what is under pressure inside the cylinder or how it has to be handled safely.
- BA stencil showing the date the cylinder body was last repainted at the shop
Paint history has no bearing on how a cylinder is handled. The dates that matter on a cylinder collar are the manufacture and retest dates, not when the shell was last painted.
- A label identifying which refrigerant is inside and stating that the contents are recovered refrigerant
- DA sticker showing the vacuum level the appliance was pumped down to before the hoses came off for the day
Evacuation level describes what happened to the appliance, not what is inside the cylinder. It gives the next person handling that cylinder nothing useful to work with.
Why C is correct
The label has to identify the refrigerant inside and make clear the contents are recovered. That is what the next handler, the storage rack, and the reclaimer all need in order to keep the product segregated and processed correctly.
What this question is testing
This item checks whether the candidate knows what information a recovery cylinder must carry for safe downstream handling, and can distinguish cylinder identification from service documentation.
On the job
A shop rack full of unlabeled cylinders is a slow motion problem. Someone eventually adds a different refrigerant to one, and a whole cylinder becomes waste. Reclaimers reject or surcharge shipments that arrive unidentified, and the shop pays for it. The habit that prevents all of it is cheap: write the refrigerant on the label as soon as the first ounce goes in, before the cylinder ever leaves the job site.
Memory technique
Label the cylinder for the next set of hands, not for the paperwork.
Exam tip
Label answers that describe the job rather than the contents are distractors. The label is about what is inside the steel.
Where to look it up
Recovery cylinders must be labeled with the refrigerant they contain and identified as recovered refrigerant.